high-performance-css-animations

To fix janky CSS animations, you must use compositor-only properties like transform and opacity. This prevents layout thrashing and recalculations, allowing the browser to offload animation work to the GPU for smooth 60fps rendering.

Animating layout properties like width or height causes layout thrashing because the browser must recalculate element geometry on every frame. Compositor-only properties like transform avoid this by handling visual changes independently on the GPU.

The best way to use will-change for GPU acceleration is to apply it sparingly to elements actively undergoing transform or opacity animations. Overusing will-change creates unnecessary browser layers and causes excessive memory consumption.

To add prefers-reduced-motion support, wrap your CSS animations in a media query checking for the reduced-motion preference. This ensures UI transitions and micro-interactions gracefully degrade by disabling movement for users who request it.

Yes, you can use transform and opacity for complex animated sequences on lower-end devices. These compositor-only properties bypass CPU layout recalculations, ensuring smooth multi-element entrance animations even with limited hardware resources.